JP3014267B2 - Steel pipe sheet pile wall construction method and steel pipe sheet pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel sheet pile construction method and a steel sheet pile used in the field of civil engineering, and more particularly to a steel sheet pile construction method and a steel sheet pile suitable for an earth retaining structure.

[0002]

2. Description of the Related Art As is well known, earth retaining works are works for minimizing deformation and settlement of the ground during excavation.
In recent years, with the demand for effective utilization of underground space, etc., it has become necessary to develop a construction method of a retaining wall corresponding to various site conditions.

[0003] Retaining walls are roughly classified into cast sheet walls, underground continuous walls, column-type underground continuous walls, stable liquid-solidified walls, prefabricated steel walls, and the like. Among the walls, the steel pipe sheet pile wall is a retaining wall suitable for large-scale excavation in soft ground or the like, and is often used recently for construction in a bay area.

In order to construct a steel sheet pile wall, it is common to drive the steel sheet pile with a diesel hammer, bipro hammer or drop hammer while checking the verticality of the steel pipe sheet pile. In order to clear the noise, a soundproof cover is attached to the diesel hammer, and the use of a water jet is used to reduce vibration and noise.

[0005]

However, at present, it is almost impossible to construct by a driving method because vibration or noise regulation is very strict near a city area.

On the other hand, in order to avoid the above-mentioned problem of noise, a method of erection of a steel pipe sheet pile in a hole excavated in advance is conceivable. In this case, however, the water stoppage at the joint between the steel pipe sheet piles is reduced. This creates another problem.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a steel pipe sheet pile wall construction method and a steel pipe sheet pile having both quietness and waterproofness.

[0008]

In order to achieve the above object, a steel pipe sheet pile wall construction method according to the present invention, as described in claim 1, comprises two connecting members provided on a steel pipe sheet pile at opposite sides. A predetermined replacement body is mounted inside one of the connecting portions, and a step of excavating a hole for embedding the steel pipe sheet pile in the ground, and simultaneously driving the excavation step around the preceding steel pipe sheet pile. Removing the hardened material and removing the substitute inside one of the connecting portions of the preceding steel pipe sheet pile to expose the inside of the connecting portion; and the other of the steel pipe sheet piles at one of the connecting portions of the preceding steel pipe sheet pile. Setting the steel sheet pile into the hole while fitting the connection part of the steel pipe sheet pile, and forming a predetermined space around the space between the one connection part of the preceding steel pipe sheet pile and the other connection part of the steel pipe sheet pile and around the steel pipe sheet pile. Inject hardening material It is intended to include and that step.

Further, the steel pipe sheet pile of the present invention is a steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other. And a connecting part of the steel pipe sheet pile to be built next is connected to the other connecting part of the steel pipe sheet pile, and a predetermined replacement formed of styrene foam or the like is attached to the inside of the one connecting part, and the replacement While preventing the hardened material injected around the perimeter from substantially entering the inside of the one connection portion, removing the replacement body at the same time as excavation to expose the inside of the one connection portion, The other connecting portion is fitted into one of the connecting portions, and in such a state, a hardening material is injected into a space between the one connecting portion and the other connecting portion.

The steel pipe sheet pile according to the present invention is a steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other. In a steel pipe sheet pile constructed so that the part and the other connection part of the steel pipe sheet pile to be built next can be connected to each other, a predetermined sheet is attached so as to surround the one connection part, and a stable liquid is provided inside the sheet. Material with a lower specific gravity than
Filling the formed filler to prevent the hardened material injected around the sheet from substantially penetrating into the inside of the one connecting portion, breaking the sheet to collapse the filler, The other connecting portion is fitted inside the one connecting portion in a state where the inside of the connecting portion is exposed,
In such a state, a curing material is injected into a space between the one connecting portion and the other connecting portion.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

In the steel sheet pile wall construction method and the steel sheet pile according to the present invention, first, a predetermined replacement is attached to one connecting portion of the steel sheet pile to be built.

On the other hand, apart from the mounting step, a hole for erection of a steel pipe sheet pile to which the replacement is mounted is excavated. When collapse of the hole wall is expected, excavation is performed while injecting a non-hardening type stabilizing solution such as a bentonite stabilizing solution into the hole.

In the excavation step, at the same time as the excavation, the replacement of the adjacent steel pipe sheet pile previously built is removed to expose the inside of one connecting portion of the preceding steel pipe sheet pile.

Next, while fitting the other connecting portion of the steel pipe sheet pile to be Komimo built now to one connection portion of the preceding steel sheet piles, Tatekomu the steel pipe sheet pile into the hole.

Next, a predetermined hardening material is injected into a space formed between the connecting portions of the two steel pipe sheet piles and around the steel pipe sheet piles.

Here, the hardening material injected into the space formed between the connecting portions of the two steel pipe sheet piles spreads all over the space, and after hardening, the hardening material blocks the underground water and the like. It functions as a water wall.

Further, the hardened material injected around the steel pipe sheet pile which is later built in firmly fixes the steel pipe sheet pile to the surrounding ground after hardening.

[0030] On the other hand, one of the steel pipe sheet pile of people that built up later
Since the replacement is attached inside the connecting portion, only the volume of the replacement is not replaced by the hardening material.

Therefore, if the substitute is removed after the hardening material has hardened, a hollow space for fitting the other connecting portion of the steel pipe sheet pile to be built next appears inside one connecting portion.

In the steel sheet pile according to the present invention, first, a predetermined sheet is attached to the steel sheet pile so as to surround one connecting portion of the steel sheet pile to be built. Here, the specific gravity is lighter than the stable liquid inside the sheet
The filler formed of the material is filled in advance.

On the other hand, apart from such attachment, a hole for erection of a steel pipe sheet pile to which a sheet is attached is excavated. When collapse of the hole wall is expected, excavation is performed while injecting a non-hardening type stabilizing solution such as a bentonite stabilizing solution into the hole.

In the excavation step, at the same time as the excavation, the sheet of the adjacent steel pipe sheet pile previously built is torn off, the filler inside the sheet collapses, and the adjacent steel pipe sheet pile is collapsed.
The inside of one connecting portion is exposed.

Next, while fitting the other connecting portion of the steel pipe sheet pile to be Komimo built now to one junction of the adjacent steel sheet pile, Tatekomu the steel pipe sheet pile into the hole.

[0036]

Next, a predetermined hardening material is injected into a space formed between the connecting portions of the two steel pipe sheet piles and around the steel pipe sheet piles, and the hardened material is hardened.

Here, the hardening material injected into the space formed between the connecting portions of the two steel pipe sheet piles spreads all over the space, and after hardening, the hardening material blocks the underground water and the like. It functions as a water wall.

Further, the hardened material injected around the steel pipe sheet pile that has been built later firmly fixes the steel pipe sheet pile to the surrounding ground after hardening.

[0040] On the other hand, one of the steel pipe sheet pile of people that built up later
Since a sheet is attached to the periphery of the connecting portion and a filler is filled inside the sheet, no hardening material is injected into the inside of the sheet.

[0041] Therefore, if the collapse of the inner filler beating sheets from the curing material is cured and then Tatekomu other hollow space for fitting the connecting portion of the steel pipe sheet pile is one <br / > Appears inside the connection.

[0042]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a construction method of a steel sheet pile wall construction method according to the present invention.

(First Embodiment) FIG. 1 is a flowchart showing a procedure of a steel pipe sheet pile wall construction method according to this embodiment.

The steel sheet pile 1 used in this method is shown in FIG.
As shown in (a), a connecting portion 3 and a connecting portion 4 are provided on a steel pipe main body 2 having an outer diameter of, for example, 1.5 m and a length of about 50 m,
Each is a long member along the longitudinal axis of the steel pipe main body 2.

The connecting portion 3 as the other connecting portion and one
The connecting portion 4 of the coupling portion, is provided with on opposite sides of the longitudinal axis of the steel pipe body 2, the connecting portion 3, Yes and juxtaposed towards the pair of angle 5 tip outwardly, The connecting portion 4 is arranged side by side with a pair of angles 6 facing each other.

The steel sheet pile 1 is connected to the angle 6 of the connecting part 4 of one steel sheet pile 1 by the angle 5 of the connecting part 3 of the steel sheet pile 1 adjacent thereto, so that the adjacent steel pipe sheet piles 1 are mutually connected. It can be connected to.

FIG. 2 (b) shows a state in which steel pipe sheet piles 1a and 1b having the same structure as the steel pipe sheet pile 1 are connected to each other.

Next, the procedure of the steel pipe sheet pile wall construction method of this embodiment will be described with reference to the flowchart of FIG.

In this embodiment, for the convenience of explanation, the steel pipe sheet piles 1b, 1c,... Are assumed to be built sequentially adjacent to the already built steel pipe sheet piles 1a.
, 1b, 1c... Have the same structure as the steel pipe sheet pile 1 described in FIG. 2, and the same portions as the steel pipe sheet pile 1 are denoted by a, b, c,.・ It is to be expressed by adding.

As can be seen from FIG. 1, in the steel pipe sheet pile construction method of the present embodiment, first, a dam body 71b is formed so as to surround a connecting part 4b as one connecting part of a steel pipe sheet pile 1b to be built. Is attached to the steel sheet pile 1b (step 101).

FIG. 3 shows a state in which a dam body 71b is attached to a steel pipe sheet pile 1b.

As can be seen from the figure, a longitudinal hollow space is formed inside the weir 71b.

The weir body 71b is designed to prevent deformation due to the pressure of the hardening material when the hardening material is injected into the surroundings in a later step.
The material and shape are appropriately selected, and for example, a plastic material such as FRP may be integrally formed in a curved shape or formed by bending a thin metal plate.

The mounting portion between the dam body 71b and the steel pipe sheet pile main body 2b has a seal structure using a welding material, an adhesive, or the like. It is better to keep out.

On the other hand, apart from the weir mounting process described above,
A hole 21b for excavating the steel pipe sheet pile 1b to which the weir 71b is attached is excavated (FIG. 1, step 102).

FIG. 4 shows the digging line of the hole 21b by a broken line.

Drilling is performed using, for example, an earth drill, and a drilling bucket attached to the tip of the kelly bar is rotated to drill holes. In order to prevent collapse of the hole wall, excavation is preferably performed while pouring a bentonite stabilizing solution, a polymer stabilizing solution, or the like as a non-curable stabilizing solution into the hole.

The excavation line (broken line) for the hole 21b is
As can be seen from the fact that it extends to the hardened material 23a injected around the steel pipe sheet pile 1a built in advance, in this step, at the same time as the ground is excavated, a part of the hardened material 23a is also cut off.

Similarly, as can be seen from the fact that the excavation line of the hole 21b extends to the weir 71a of the steel pipe sheet pile 1a, in this step, at the same time as the ground is excavated, the weir 71a is broken by a drilling bucket or the like. The inside of the connecting portion 4a of the steel sheet pile 1a is exposed (FIG. 1, step 103).

FIG. 5 shows a state in which a hole 21b has been formed after the excavation step.

As can be seen from the figure, it can be seen that the dam body 71a is broken and the inside of the connecting portion 4a is exposed to the bentonite stabilizing solution 31b.

Next, one of the adjacent steel pipe sheet piles 1a is connected.
The steel pipe sheet pile 1b is built into the hole 21b while the connecting part 3b, which is the other connecting part of the steel pipe sheet pile 1b to be built, is fitted into the connecting part 4a (FIG. 1, step 104).

FIG. 6 shows a state at the time when the construction of the steel pipe sheet pile 1b has been completed.

Next, bentonite mortar 23b is injected into the space formed between the connecting portion 4a of the steel pipe sheet pile 1a and the connecting portion 3b of the steel pipe sheet pile 1b and around the steel pipe sheet pile 1b, and the bentonite stabilizing solution 31b is poured into the bentonite mortar. 23b (step 106).

FIG. 7 shows a state after the bentonite stabilizing solution 31b has been replaced with bentonite mortar 23b. In the figure, reference numerals 41, 42, and 43 indicate piping positions for injecting bentonite mortar.

As can be seen from the piping position, care should be taken that the steel pipe sheet pile 1b does not tilt due to the mortar injection pressure.

The bentonite mortar 23b injected into the space formed between the connecting portions of the two steel sheet piles 1a and 1b spreads all over the space, and after hardening, impermeable to groundwater and the like. It functions as a waterproof wall.

Further, the bentonite mortar 23b injected around the steel pipe sheet pile 1b which is later built in firmly fixes the steel pipe sheet pile 1b to the surrounding ground after hardening.

On the other hand, since the dam body 71b is attached around the connecting portion 4b of the steel pipe sheet pile 1b, the injected bentonite mortar 23b does not enter into the connecting portion 4b, and therefore, when the bentonite mortar 23b is hardened. Inside the connecting part 4b, the other side of the steel pipe sheet pile 1c to be built next
A hollow space is formed for fitting the connecting portion 3c as the connecting portion.

Thus, a series of processes for the steel pipe sheet pile 1b is completed. However, when the steel pipe sheet pile 1c is to be erected continuously, as in step 101, one of the steel pipe sheet piles 1c is formed .
Weir body 71 surrounds connecting portion 4c which is a connecting portion.
c is attached to the steel pipe sheet pile 1c, and a hole 21c for excavating the steel pipe sheet pile 1c is excavated as in step 102. Then, as in step 103, the ground is excavated, and at the same time, the dam body 71b is broken with a drilling bucket or the like, and the steel pipe sheet pile 1
The inside of the connecting portion 4b of b is exposed.

Hereinafter, although detailed description is omitted, the steps 104 to 105 may be sequentially repeated as described above.

Thus, by repeating steps 101 to 105 of FIG. 1 as necessary, a plurality of steel pipe sheet piles are built, whereby a steel pipe sheet pile wall having a desired length, for example, several hundred meters can be constructed.

After the construction of the steel sheet pile wall, the area surrounded by the steel sheet pile wall is excavated while providing a belly, cutting beams and the like as appropriate.
Build a given structure. After constructing the structure, the work such as backfilling is performed, and if necessary, the constructed steel sheet pile wall is removed.

The conventional steel pipe sheet pile wall method has advantages and disadvantages in that the noise and vibration are severe when performed by the driving method and the water stoppage is reduced when the method is performed by the built-in method. And, in the construction method, as described above, a predetermined dam body is attached to one of the connecting portions of the steel pipe sheet pile in advance to prevent mortar from entering the connecting portion,
Mortar beating Sekitai after hardening the other of the following steel pipe sheet pile
Since the two connecting portions are fitted, the mortar or the like does not adhere to the vicinity of the connecting portion, so that the fitting of the connecting portions is not hindered. Can be easily built.

As described above, since there is almost no friction or resistance at the time of building, no noise or vibration is generated, and the construction method is extremely quiet.

[0076] After that built up the following steel sheet pile, prior to filling the mortar into the gap occurring between one of the connecting portion and the other connecting <br/> formation of the next steel sheet pile of steel sheet pile As a result, it is possible to remarkably improve the water stoppage at the connecting portion.

The underground continuous wall method is well known as an earth retaining method excellent in silence and water stoppage. However, when it is necessary to remove the underground wall method later, the steel pipe sheet pile wall method of this embodiment is the most suitable method. Becomes

In this embodiment, bentonite mortar is used as a hardening material.
For example, ordinary mortar or concrete may be used.

Further, in this embodiment, the connecting portion of the steel pipe sheet pile is formed as shown in FIG. 2. However, as long as a space in which mortar can be filled is formed in the connected portion, any shape of connecting portion can be used. Department.

Further, in this embodiment, the mounting portion between the weir and the steel pipe sheet pile has a seal structure. However, it is not necessary to completely prevent the infiltration of the hardening material. For example, only the cement or the aggregate portion is blocked. I suffice. Therefore, some water may enter the interior.

In this embodiment, the place where the dam is attached to the steel pipe sheet pile is not mentioned at all. However, such attachment is performed in advance in a factory, and the steel pipe sheet pile with the dam is attached to the site. Needless to say, this may be done.

(Second Embodiment) Next, a second embodiment will be described. Components substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

FIG. 8 is a flowchart showing a procedure of a steel pipe sheet pile wall construction method according to the second embodiment.

As can be seen from the figure, in the steel pipe sheet pile wall construction method of this embodiment, first, the replacement body 51b is attached to the connecting part 4b, which is one connecting part of the steel pipe sheet pile 1b to be built from now on ( Step 111).

FIG. 9 shows a state in which a substitute 51b is attached to a steel pipe sheet pile 1b.

As can be seen from the figure, the replacement body 51b is designed not to be damaged by the pressure of the hardened material when the hardened material is injected into the surroundings in a later step, and to have a predetermined excavation drive during the excavation step. The material is appropriately selected so that the material can be removed from the connecting portion by force, and for example, the material is preferably formed of a solid body of Styrofoam.

On the other hand, apart from the above-described replacement body mounting step, a hole 21b for excavating the steel pipe sheet pile 1b to which the replacement body 51b is mounted is excavated (FIG. 8, step 112).

FIG. 10 shows a digging line of the hole 21b by a broken line.

Since the excavation method is substantially the same as that of the first embodiment, a detailed description thereof will be omitted. However, as can be seen from the fact that the excavation line of the hole 21b extends to the replacement body 51a of the steel pipe sheet pile 1a. In this process, the excavation of the ground and at the same time, the replacement 51a is removed with a drilling bucket or the like to expose the inside of the connecting portion 4a of the steel pipe sheet pile 1a (FIG. 8, step 113).

When styrofoam or the like is used as the replacement body 51a, for example, when the cutting surface of the drilling bucket acts on the replacement body 51a, the replacement body 51a is broken up and rises in the bentonite stable liquid, and easily from the connecting portion 4a. Removed.

FIG. 11 shows a state in which a hole 21b has been formed after the excavation step.

Next, as shown in FIG. 12, the steel pipe sheet pile 1b is inserted into the connection part 4a of the adjacent steel pipe sheet pile 1a while the connection part 3b, which is the other connection part of the steel pipe sheet pile 1b to be built , is fitted. It is built in the hole 21b (FIG. 8, step 114), and then, as shown in FIG. 13, the space formed between the connecting part 4a of the steel pipe sheet pile 1a and the connecting part 3b of the steel pipe sheet pile 1b and the steel pipe sheet pile 1b. Of bentonite mortar 23b around the periphery of
b is replaced with bentonite mortar 23b (FIG. 8, step 115).

Here, the bentonite mortar 23b injected into the space formed between the connecting portions of the two steel pipe sheet piles 1a and 1b spreads all over the space, and after hardening, drains groundwater and the like. Exhibits the function as a water blocking wall that blocks water.

The bentonite mortar 23b injected around the steel pipe sheet pile 1b firmly fixes the steel pipe sheet pile 1b to the surrounding ground after hardening.

On the other hand, since the replacement 51b is mounted inside the connecting portion 4b of the steel pipe sheet pile 1b, the replacement 51b is attached.
Is not replaced by the bentonite mortar 23b.

Therefore, if the bentonite mortar 23b is hardened and then removed during excavation, a hollow space for fitting the connecting portion 3c of the steel pipe sheet pile 1c to be built next appears inside the connecting portion 4b.

Hereinafter, although detailed description is omitted, steps 111 to 115 of FIG. 8 are repeated as necessary to build a plurality of steel pipe sheet piles to obtain a desired length,
For example, a steel sheet pile wall spanning several hundred meters can be constructed.

The other operations and effects of the second embodiment are almost the same as those of the first embodiment, and therefore, detailed description is omitted.

As in the first embodiment, ordinary mortar or concrete may be used as the hardening material.
The connection portion of the steel pipe sheet pile may be any shape as long as a space in which the mortar can be filled in the connected state is formed. Further, it goes without saying that the replacement body may be mounted in advance at a factory, and may be carried to the site.

(Third Embodiment) Next, a third embodiment will be described. In addition, the same reference numerals are given to components and the like that are substantially the same as those in the first or second embodiment, and description thereof is omitted.

FIG. 14 shows a steel pipe sheet pile according to the third embodiment.

As can be seen from the figure, the steel sheet pile according to the third embodiment has the sheet 11 attached so as to surround the connecting portion 4 which is one connecting portion of the steel pipe sheet pile 1.

The sheet 11 has a lobe 1 for reinforcing it.
2 are provided on both sides, and the holding plate 1
By hitting 3 and driving the stud 14 into the angle 6,
The sheet 11 is fixed to the steel sheet pile 1. In this state, a longitudinal hollow space is formed inside the sheet 11.

Next, a procedure for constructing a steel sheet pile wall using the steel sheet pile of the present embodiment will be described.

In this embodiment, for convenience of explanation, the sheets 11a, 11b, 11c...
, 1b, 1c,... And the steel pipe sheet piles 1b, 1c...
And the same parts as those related to
It is assumed that reference numerals a, b, c,...

In order to construct a steel sheet pile wall using the steel sheet pile of this embodiment, first, a hole 21b for excavating the steel sheet pile 1b to which the sheet 11b is attached is excavated.

FIG. 15 shows the digging line of the hole 21b by a broken line.

[0108] Excavation is performed using, for example, an earth drill, as in the first or second embodiment, and drilling is performed by rotating a drilling bucket attached to the tip of the kelly bar. In order to prevent collapse of the hole wall, excavation is preferably performed while pouring a bentonite stabilizing solution, a polymer stabilizing solution, or the like as a non-curable stabilizing solution into the hole.

The excavation line (broken line) for the hole 21b is
As can be seen from the fact that it extends to the hardened material 23a filled around the steel pipe sheet pile 1a built in advance, a part of the hardened material 23a is also cut off during excavation.

Similarly, as can be seen from the fact that the excavation line of the hole 21b extends to the sheet 11a of the steel pipe sheet pile 1a and the filler 22a which has been filled in the internal space of the sheet 11a, the drilling bucket is formed when the ground is excavated. The sheet 11a is torn off by using the filler 22a inside the sheet 11a.
And the inside of the connecting portion 4a of the steel pipe sheet pile 1a is exposed.

FIG. 16 shows a state in which a hole 21b has been formed after excavation.

As can be seen from the figure, it can be seen that the sheet 11a has been torn and the internal filler 22a has collapsed, and the interior of the connecting portion 4a has been exposed to the bentonite stabilizer 31b.

Next, one of the adjacent steel pipe sheet piles 1a is connected.
The steel pipe sheet pile 1b is built into the hole 21b while the connecting part 3b, which is the other connecting part of the steel pipe sheet pile 1b to be built, is fitted into the connecting part 4a.

FIG. 17 shows a state at the time when the construction of the steel pipe sheet pile 1b has been completed.

Next, the sheet 1 attached to the steel pipe sheet pile 1b
1b is filled with a filler 22b.

The filler 22b is made of a material having a specific gravity higher than the specific gravity of the bentonite solution (usually in the range of 1.0 to 1.3), for example, crushed stone, blast furnace slag (specific gravity of about 2.5), or electric furnace slag as a material having a higher specific gravity. (specific gravity
It is preferable to use iron, magnetite, iron sand, limonite, etc. (specific gravity 2.4 to 8) which are known as heavy aggregates of 3.5) and concrete.

FIG. 18 shows a state at the time when the filling of the filler is completed.

Next, bentonite mortar 23b is injected into the space formed between the connecting portion 4a of the steel pipe sheet pile 1a and the connecting portion 3b of the steel pipe sheet pile 1b and around the steel pipe sheet pile 1b. Replace with 23b.

FIG. 19 shows a state after the bentonite stabilizing solution 31b has been replaced with bentonite mortar 23b. In the figure, 41, 42 and 43 are:
It is a figure which shows the piping position for injecting bentonite mortar.

As can be seen from the piping position, care should be taken so that the steel pipe sheet pile 1b does not tilt due to the mortar injection pressure.

Thus, a series of processes for the steel pipe sheet pile 1b is completed. However, when the steel pipe sheet pile 1c is to be erected continuously, one of the connecting portions of the steel pipe sheet pile 1c is similar to the above.
The sheet 11c is mounted on the steel sheet pile 1c so as to surround the connecting portion 4c, and a hole 21c for excavating the steel sheet pile 1c is excavated. Next, at the same time as excavating the ground, the sheet 11b is torn off with a drilling bucket or the like to collapse the filler 22b inside the sheet 11b, and the steel pipe sheet pile 1b
The inside of the connecting portion 4b is exposed.

FIG. 20 shows a state after excavation of the hole 21c.

Thus, by repeating the above-described procedure as many times as necessary to build a plurality of steel pipe sheet piles, it is possible to construct a steel pipe sheet pile wall having a desired length, for example, several hundred meters.

After constructing the steel sheet pile wall, the area surrounded by the steel sheet pile wall was excavated while appropriately providing uprights, cutting beams, and the like.
Build a given structure. After constructing the structure, the work such as backfilling is performed, and if necessary, the constructed steel sheet pile wall is removed.

In the case of constructing a steel sheet pile wall using a conventional steel sheet pile, noise and vibration are severe when driven by the driving method.
Although there were advantages and disadvantages such as lowering the water stoppage when performed by the construction method, when the construction was performed using the steel pipe sheet pile of this embodiment, as described above, the sheet attached to one connecting portion of the steel pipe sheet pile By filling the inside of the filler with
Since the mortar was prevented from infiltrating into the connection portion, and after the mortar was hardened, the filler was removed to form a hollow space, into which the other connection portion of the next steel sheet pile was fitted. In addition, the mortar or the like does not adhere to the vicinity of the connecting portion to prevent the fitting of the connecting portions from being hindered, and the connecting portions can be smoothly fitted to each other to easily install the next steel pipe sheet pile.

As described above, since there is almost no friction or resistance at the time of building, no noise or vibration is generated, and the quietness is extremely enhanced.

[0127] After that built up the following steel sheet pile, prior to filling the mortar into the gap occurring between one of the connecting portion and the other connecting <br/> formation of the next steel sheet pile of steel sheet pile As a result, it is possible to remarkably improve the water stoppage at the connecting portion.

The underground continuous wall method is well known as an earth retaining method excellent in quietness and water stoppage. However, if it is necessary to remove the underground wall method later, the steel pipe sheet pile wall method of this embodiment is most suitable. Becomes

Further, since a filler having a specific gravity larger than the specific gravity of the stabilizing liquid to be injected into the holes was selected as the filling material, the filler smoothly sinks into the stabilizing liquid when filling the inside of the sheet, and does not clog in the middle of the sheet. Can be filled inside.

Further, in this embodiment, bentonite mortar is used as a hardening material, but a material having a predetermined strength and water-blocking property, for example, ordinary mortar or concrete may be used.

Further, in this embodiment, the connecting portion of the steel pipe sheet pile is formed as shown in FIG. 2. However, as long as a space in which mortar can be filled is formed in the connected state, any shape of connecting portion can be used. Department.

In this embodiment, the place where the sheet is to be attached is not particularly described. However, a sheet attached in advance in a factory or the like may be carried into the site and built.

In this embodiment, the sheet is filled with the filler after the steel pipe sheet pile has been installed. However, when the sheet is attached at the factory, the sheet is simultaneously filled with the filler. In advance, this may be carried into the site and built.

In such a case, the specific gravity of the filler does not need to be heavier than that of the bentonite stabilizing solution. Rather, in consideration of recovery and reuse after building or handling during transportation, etc. A relatively light material may be formed in a granular or dumpling shape, and these may be packed in a sheet.

[0135]

As described above, according to the steel pipe sheet pile wall construction method of the present invention, a predetermined replacement is provided inside one of the two connection parts provided on the steel pipe sheet pile on opposite sides. A step of excavating a hole for embedding the steel pipe sheet pile in the ground while attaching the body, and simultaneously with the excavation step, shaving off a hardened material poured around the preceding steel pipe sheet pile and one of the preceding steel pipe sheet piles; Removing the substituted body inside the connecting portion to expose the inside of the connecting portion; and inserting the other connecting portion of the steel pipe sheet pile into one connecting portion of the preceding steel pipe sheet pile and inserting the steel pipe sheet pile in the hole. And a step of injecting a predetermined hardening material into a space between one connecting portion of the preceding steel pipe sheet pile and the other connecting portion of the steel pipe sheet pile and around the steel pipe sheet pile. Noise-free and vibration-free It is possible to construct a highly aqueous earth retaining wall.

Further, the steel pipe sheet pile of the present invention is a steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other. In a steel pipe sheet pile configured to be mutually connectable with the other connection part of the sheet pile, a predetermined replacement body made of styrene foam or the like is attached inside the one connection part, and a hardened material injected around the replacement body To prevent substantially infiltration into the inside of the one connection part, and removing the replacement body at the same time as excavation to expose the inside of the one connection part so as to expose the inside of the one connection part. The other connecting portion is fitted inside, and in such a state, the hardening material is injected into the space between the one connecting portion and the other connecting portion, so that in relation to the preceding steel pipe sheet pile, Filling the connection part with hardener and stopping water While it is possible to secure, in the later Tatekomu relationship between steel sheet pile, it is possible to secure the Kenkomi workability inner connecting portion to form a predetermined cavity.

A steel pipe sheet pile according to the present invention is a steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other. In a steel pipe sheet pile configured to be mutually connectable with the other connection part of the sheet pile, a predetermined sheet is attached so as to surround the one connection part and is stable inside the sheet.
Thereby to cure material injected around <br/> the sheet is filled with a filler that is formed with a light specific gravity material is not substantially intrude inside connecting portion of the one than the liquid, the The other connecting portion is fitted inside the one connecting portion in a state where the filler is broken by breaking a sheet to expose the inside of the one connecting portion, and in this state, the one connecting portion and the other are fitted. As the hardening material is injected into the space between the connecting parts, the hardening material can be filled in the connecting parts to secure the water stoppage in relation to the preceding steel pipe sheet pile, while In relation to the steel pipe sheet pile to be inserted, a predetermined hollow space can be formed inside the connecting portion, and it becomes possible to secure the erection workability.

[0138]

[0139]

[0140]

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure of a steel pipe sheet pile wall construction method according to a first embodiment.

2A is a cross-sectional view of a steel pipe sheet pile used in the steel sheet pile wall construction method according to the present embodiment, and FIG. 2B is a view showing a state in which two steel pipe sheet piles are connected.

FIG. 3 is a view showing a state where a weir body is attached to a connecting portion of a steel pipe sheet pile.

FIG. 4 is a diagram showing a line for excavating a hole for installing a steel pipe sheet pile.

FIG. 5 is a view showing a state in which excavation of a hole for a steel pipe sheet pile has been completed.

FIG. 6 is a view showing a state in which a steel pipe sheet pile is erected in a hole excavated.

FIG. 7 is a diagram showing a state in which bentonite mortar is injected into a space formed between a connecting portion between two steel pipe sheet piles and the connecting section and around the steel pipe sheet pile.

FIG. 8 is a flowchart illustrating a procedure of a steel pipe sheet pile wall construction method according to a second embodiment.

FIG. 9 is a view showing a state in which a replacement body is attached to a connecting portion of a steel pipe sheet pile.

FIG. 10 is a diagram showing a line for excavating a hole for installing a steel pipe sheet pile.

FIG. 11 is a view showing a state in which excavation of a hole for a steel pipe sheet pile has been completed.

FIG. 12 is a view showing a state in which a steel pipe sheet pile is erected in an excavated hole.

FIG. 13 is a diagram showing a state in which bentonite mortar is injected into a space formed between a connecting portion between two steel pipe sheet piles and a surrounding portion of the steel pipe sheet pile.

FIG. 14 is a diagram showing a state in which a sheet is attached to a connecting portion of a steel pipe sheet pile.

FIG. 15 is a diagram showing a line for excavating a hole for installing a steel pipe sheet pile.

FIG. 16 is a diagram showing a state in which excavation of a hole for a steel pipe sheet pile has been completed.

FIG. 17 is a view showing a state in which a steel pipe sheet pile is erected in the excavated hole.

FIG. 18 is a diagram showing a state in which a filler is filled inside the sheet of the piled steel pipe sheet pile.

FIG. 19 is a view showing a state in which bentonite mortar is injected into a space formed between a connecting portion of two steel pipe sheet piles and around the steel pipe sheet pile.

FIG. 20 is a diagram showing a state where another hole is excavated.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Steel pipe sheet pile 3 Connection part (the other connection part) 4 Connection part (one connection part) 11 Sheet 22 Filler 23 Bentonite mortar (hardening material) 31 Bentonite solution (non-hardening type stable liquid) 51 Substituent body 71 dam body 101 Weir Body Mounting Step 102 Drilling Step 103 Exposure Step 104 Building Step 105 Hardening Material Injection Step 111 Replacement Body Mounting Step 112 Drilling Step 113 Replacement Body Removing Step 114 Building Step 115 Hardening Material Injection Step

Continued on the front page (72) Inventor Jin Kitamura 4-33 Kitahama Higashi, Chuo-ku, Osaka City Inside the Obayashi Corporation Osaka Main Store (72) Inventor Hitoshi Nagao 4-33 Kitahama Higashi, Chuo-ku, Osaka City Obayashi Corporation Osaka Inside the main store (72) Inventor Kyoji Ikeda 4-33 Kitahamahigashi, Chuo-ku, Osaka City Obayashi Corporation Osaka Main store (72) Inventor Mitsuo Tanagaki 2-2-25 Umeda, Kita-ku, Osaka Goyo Construction Co., Ltd. Osaka Inside the branch (72) Inventor Kazuhiro Kimoto 2-2-25 Umeda, Kita-ku, Osaka-shi Goyo Construction Co., Ltd. Osaka branch (56) References JP-A-54-48911 (JP, A) 156625 (JP, A) JP 56-14810 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02D 5/02-5/20

Claims (3)

(57) [Claims] 1. A predetermined replacement is mounted inside one of two connecting portions provided on a steel pipe sheet pile so as to be opposite to each other, and a hole for embedding the steel pipe sheet pile is formed in the ground. And, simultaneously with the excavation step, shaving off the hardened material cast around the preceding steel pipe sheet pile and removing the substitute inside one of the connection parts of the preceding steel pipe sheet pile to remove the inside of the connection part. Exposing the steel pipe sheet pile into the hole while fitting the other connection part of the steel pipe sheet pile into one connection part of the preceding steel pipe sheet pile, and one connecting part of the preceding steel pipe sheet pile. Injecting a predetermined hardening material into a space between the steel pipe sheet pile and the other connecting portion and around the steel pipe sheet pile. 2. A steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other, wherein the one connecting portion and the other connecting portion of a steel pipe sheet pile to be erected next. In a steel pipe sheet pile configured to be connectable to each other, a predetermined replacement formed of styrene foam or the like is attached to the inside of the one connection portion, and a hardened material injected around the replacement is filled in the one connection portion. While substantially preventing intrusion into the, the other connecting portion is fitted inside the one connecting portion in a state where the replacement body is removed at the same time as excavation and the inside of the one connecting portion is exposed, A steel pipe sheet pile characterized in that a hardening material is injected into a space between the one connecting portion and the other connecting portion in such a state. 3. A steel pipe sheet pile provided with one connecting portion and the other connecting portion so as to be opposite to each other, wherein said one connecting portion and the other connecting portion of a steel pipe sheet pile to be erected next. A predetermined sheet is attached so as to surround the one connecting portion, and a material having a specific gravity smaller than that of the stable liquid is provided inside the sheet.
The hardening material injected around the sheet is filled with a filler formed of a filler so that the hardening material does not substantially enter the inside of the one connecting portion, and the sheet is broken to break the filler. The other connecting portion is fitted into the one connecting portion in a state where the inside of the one connecting portion is exposed, and in such a state, the space is hardened in a space between the one connecting portion and the other connecting portion. A steel pipe sheet pile characterized by injecting a material.